that assad is using it as the government in charge or that the rebels have it? and we know inside the rebel organization, if you can call it that, are muslim extremists? >> absolutely. they're both bad because once one uses it, the other side will use it. the real danger is hezbollah gets it and would use it on israel. that's the great fear that i have. >>brian: general, how do you know all this stuff about agents? was that a focus of yours? >> i used to be in command of a unit that used to have that mission before we signed the chemical weapons treaty. i'm intimately familiar with using them, storing them, putting them on airplanes. this is with fighters we had them. and that is a very difficult area to work on. and i had a great deal of experience with that. of course we no longer use them and it's no longer in our inventory. >>brian: we know the president said that's a red line. we think we know where this stuff is housed. can we go with an airstrike, blow it up and not poison the surrounding population? >> no. i think you'd have secondary fallout and it woul